Abstract

1 Scope This International Standard defines the following quantities commonly used to express the composition of gas mixtures:

— mole fraction ,

— mass fraction ,

— volume fraction ,

and

— mole concentration ,

— mass concentration ,

— volume concentration .

For these quantities of composition, this International Standard provides methods for

— conversion between different quantities, and

— conversion between different state conditions.

Conversion between different quantities means calculating the numerical value of an analyte content in term...

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